>>7766070I had a Brazilian gf who explained saudade to me as a combination of happiness and sadness, sad that something good is no longer in your life but happy that you got to have it. She used it to explain how she felt when we were briefly doing long distance.
Generally, saudade is different from nostalgia in that it's often used in reference to a person who is or was personally important to you (used a lot in love songs) rather than abstract notions of times gone by.
